<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
                <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
                <el-breadcrumb-item>数据统计</el-breadcrumb-item>
                <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片试图区域 -->
        <el-card>
            <!-- 2\为Echarts准备一个具备大小（宽高）的Dom -->
            <div id="main" style="width:750px;height:500px"></div>
        </el-card>
    </div>
</template>

<script>
// 1导入安装引入echarts
import * as echarts from "echarts"
import _ from 'lodash'
export default {  
    data(){
        return{
            // 需要合并的数据
            options: {
                title: {
                text: '用户来源'
                },
                tooltip: {
                trigger: 'axis',
                axisPointer: {
                    type: 'cross',
                    label: {
                    backgroundColor: '#E9EEF3'
                    }
                }
                },
                grid: {
                left: '3%',
                right: '4%',
                bottom: '3%',
                containLabel: true
                },
                xAxis: [
                {
                    boundaryGap: false
                }
                ],
                yAxis: [
                {
                    type: 'value'
                }
                ]
            }

        }
    },
    created() {        
    },
    // 此时，页面上的元素，已经被渲染完毕
    async mounted(){
        // 3、基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'));
        const {data:res}=await this.$http.get(`reports/type/1`)
        if(res.meta.status!==200){
            return this.$message.error('获取折线图数据失败');
        }
        // 4、准备数据和配置项
       const result=_.merge(res.data,this.options)
        // 5、展示数据
        myChart.setOption(result)
    },
    methods:{}
}
</script>

<style lang="less" scoped>
    
</style>
